Hiroyuki ATARASHI


Performance Evaluation of LTE-Advanced Heterogeneous Network Deployment Using Carrier Aggregation between Macro and Small Cells
Takahiro TAKIGUCHI Kohei KIYOSHIMA Yuta SAGAE Kengo YAGYU Hiroyuki ATARASHI Sadayuki ABETA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/06/01
Vol. E96-B  No. 6  pp. 1297-1305
Type of Manuscript:  Special Section PAPER (Special Section on Heterogeneous Networks for Future Cellular Systems)
Category: 
Keyword: 
LTE-Advanced (LTE-A)carrier aggregationheterogeneous networksmall cell
 Summary | Full Text:PDF

Experimental Evaluation of Time Diversity Effect in Hybrid ARQ Considering Space and Path Diversity for Downlink OFDM-Based Broadband Radio Access
Nobuhiko MIKI Hiroyuki ATARASHI Kenichi HIGUCHI Mamoru SAWAHASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1516-1526
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
time diversityhybrid ARQOFDMbroadband radio access
 Summary | Full Text:PDF

Accurate FFT Processing Window Timing Detection Based on Maximum SIR Criterion in OFCDM Wireless Access
Satoshi NAGATA Noriyuki MAEDA Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 552-560
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
FFT window timingSIRinter-symbol interferenceOFCDM
 Summary | Full Text:PDF

Comparison of Throughput Employing Hybrid ARQ Packet Combining in Forward Link OFCDM Broadband Packet Wireless Access
Nobuhiko MIKI Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 594-603
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
OFCDMhybrid ARQincremental redundancyChase combining
 Summary | Full Text:PDF

Variable Spreading and Chip Repetition Factors (VSCRF)-CDMA in Reverse Link for Broadband Packet Wireless Access
Yoshikazu GOTO Teruo KAWAMURA Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 509-519
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
broadband packet wireless accessreverse linkVSCRF-CDMAchip repetitionspreading
 Summary | Full Text:PDF

Variable Spreading Factor-OFCDM with Two Dimensional Spreading that Prioritizes Time Domain Spreading for Forward Link Broadband Wireless Access
Noriyuki MAEDA Yoshihisa KISHIYAMA Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 487-498
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
VSF-OFCDMtwo dimensional spreadingtwo-dimensional orthogonal channelization code assignment
 Summary | Full Text:PDF

Field Experiments on Throughput Performance above 100 Mbps in Forward Link for VSF-OFCDM Broadband Wireless Access
Yoshihisa KISHIYAMA Noriyuki MAEDA Kenichi HIGUCHI Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 604-614
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
broadband packet wireless accessforward linkVSF-OFCDMthroughputfield experiments
 Summary | Full Text:PDF

Fast Cell Search Algorithm for Overlay System with Cellular and Isolated Cells in Forward Link for OFCDM Broadband Wireless Access
Motohiro TANNO Hiroyuki ATARASHI Kenichi HIGUCHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/01/01
Vol. E88-B  No. 1  pp. 159-169
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part 1)
Category: Cell Selection
Keyword: 
OFCDMcell searchcellular cellisolated celloverlay
 Summary | Full Text:PDF

Radio Link Capacity Comparison between MC/DS-CDMA and MC-CDMA in Reverse Link Broadband Wireless Access
Shingo SUWA Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1645-1655
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
broadband packet wireless accessreverse linkmulti-carrier/DS-CDMAmulti-carrier CDMA
 Summary | Full Text:PDF

Three-Step Cell Search Algorithm Exploiting Common Pilot Channel for OFCDM Broadband Wireless Access
Motohiro TANNO Hiroyuki ATARASHI Kenichi HIGUCHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Vol. E86-B  No. 1  pp. 325-334
Type of Manuscript:  Special Section PAPER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
Category: 
Keyword: 
mobile radiobroadband packet wireless accessOFCDMinitial cell search
 Summary | Full Text:PDF

Performance Comparison of Channel Interleaving Methods in Frequency Domain for VSF-OFCDM Broadband Wireless Access in Forward Link
Noriyuki MAEDA Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Vol. E86-B  No. 1  pp. 300-313
Type of Manuscript:  Special Section PAPER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
Category: 
Keyword: 
channel interleavingbit interleavingsymbol interleavingchip interleavingVSF-OFCDM
 Summary | Full Text:PDF

Variable Spreading Factor-Orthogonal Frequency and Code Division Multiplexing (VSF-OFCDM) for Broadband Packet Wireless Access
Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Vol. E86-B  No. 1  pp. 291-299
Type of Manuscript:  Special Section PAPER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
Category: 
Keyword: 
broadband packet wireless accessOFCDMOFDMvariable spreading factorVSF-OFCDM
 Summary | Full Text:PDF

Multipath Interference Canceller Employing Multipath Interference Replica Generation with Previously Transmitted Packet Combining for Incremental Redundancy in HSDPA
Nobuhiko MIKI Sadayuki ABETA Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/01/01
Vol. E86-B  No. 1  pp. 142-153
Type of Manuscript:  Special Section PAPER (Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)
Category: 
Keyword: 
multipath interference cancellerhybrid ARQsoft-decisionhigh-speed downlink packet access
 Summary | Full Text:PDF

Investigation of Inter-Carrier Interference due to Doppler Spread in OFCDM Broadband Packet Wireless Access
Hiroyuki ATARASHI Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/12/01
Vol. E85-B  No. 12  pp. 2684-2693
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
broadband packet wireless accessOFCDMDoppler spreadinter-carrier interference
 Summary | Full Text:PDF

Antenna Diversity Reception Appropriate for MMSE Combining in Frequency Domain for Forward Link OFCDM Packet Wireless Access
Noriyuki MAEDA Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/10/01
Vol. E85-B  No. 10  pp. 1966-1977
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
broadband wireless accessforward linkOFCDMantenna diversity
 Summary | Full Text:PDF

Pilot Channel Assisted MMSE Combining in Forward Link for Broadband OFCDM Packet Wireless Access
Noriyuki MAEDA Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/07/01
Vol. E85-A  No. 7  pp. 1635-1646
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
broadband packet wireless accessforward linkOFCDMpilot channel assisted MMSE combining
 Summary | Full Text:PDF

Optimum Bandwidth per Sub-Carrier of Multicarrier/DS-CDMA for Broadband Packet Wireless Access in Reverse Link
Shingo SUWA Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/07/01
Vol. E85-A  No. 7  pp. 1624-1634
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
broadband packet wireless accessreverse linkmulticarrier/DS-CDMAoptimum bandwidth
 Summary | Full Text:PDF

Comparison of Hybrid ARQ Packet Combining Algorithm in High Speed Downlink Packet Access in a Multipath Fading Channel
Nobuhiko MIKI Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/07/01
Vol. E85-A  No. 7  pp. 1557-1568
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
hybrid ARQadaptive modulation and codingmultipath interference cancellerhigh speed downlink packet access
 Summary | Full Text:PDF

Comparison of Hybrid ARQ Schemes and Optimization of Key Parameters for High-Speed Packet Transmission in W-CDMA Forward Link
Nobuhiko MIKI Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/07/01
Vol. E84-A  No. 7  pp. 1681-1690
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
mobile radioW-CDMAhigh-speed downlink packet accesshybrid ARQ
 Summary | Full Text:PDF

Performance Evaluation of Coherent High-Speed TD-OFCDM Broadband Packet Wireless Access in Forward Link Employing Multi-Level Modulation and Hybrid ARQ
Hiroyuki ATARASHI Sadayuki ABETA Mamoru SAWAHASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2001/07/01
Vol. E84-A  No. 7  pp. 1670-1680
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
broadband packet wireless accessforward linkTD-OFCDMmulti-level modulationhybrid ARQ
 Summary | Full Text:PDF

Performance of Coherent Multi-Carrier/DS-CDMA and MC-CDMA for Broadband Packet Wireless Access
Sadayuki ABETA Hiroyuki ATARASHI Mamoru SAWAHASHI Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/03/01
Vol. E84-B  No. 3  pp. 406-414
Type of Manuscript:  Special Section PAPER (Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21st Century)
Category: 
Keyword: 
broadband packet wireless accesssingle-carrier/DS-CDMAmulti-carrier/DS-CDMAmulticarrier CDMA
 Summary | Full Text:PDF

Analysis of the Relation between Chip Rate and Capacity in DS/CDMA Cellular Systems Considering Adjacent Channel Interference
Kouta KINOSHITA Hiroyuki ATARASHI Yoshihiro ISHIKAWA Seizo ONOE Yoshinobu NAKAMURA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2697-2705
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
chip rateDS/CDMAadjacent channel interference
 Summary | Full Text:PDF

An Efficient ARQ Scheme for Multi-Carrier Modulation Systems Based on Packet Combining
Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/05/25
Vol. E82-B  No. 5  pp. 731-739
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
ARQmulti-carrier modulationpacket combiningadaptive data order rearrangement
 Summary | Full Text:PDF

A Computational Cost Reduction Scheme for a Post-Distortion Type Nonlinear Distortion Compensator of OFDM Signals
Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/12/25
Vol. E81-B  No. 12  pp. 2334-2342
Type of Manuscript:  Special Section PAPER (Special Issue on the Latest Development of Telecommunication Research)
Category: Wireless Communication Systems
Keyword: 
OFDMnonlinear distortionpost-distortion type nonlinear distortion compensatormaximum likelihood detection
 Summary | Full Text:PDF

Orthogonal Multicode OFDM-DS/CDMA System Using Partial Bandwidth Transmission
Daisuke TAKEDA Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/11/25
Vol. E81-B  No. 11  pp. 2183-2190
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
OFDM-DS/CDMARAKEfrequency selective fadingpartial bandwidth transmissionpacket communication
 Summary | Full Text:PDF

Partial Capture Effect for Multi-Carrier Radio Packet Communication Network
Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/02/25
Vol. E80-B  No. 2  pp. 372-378
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
multi carrier modulationpartial capture effectthroughputaverage number of transmissions
 Summary | Full Text:PDF

Partial Frequency ARQ System for Multi-Carrier Packet Communication
Hiroyuki ATARASHI Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/08/25
Vol. E78-B  No. 8  pp. 1197-1203
Type of Manuscript:  Special Section PAPER (Special Issue on Technologies for High-Speed Mobile Communications)
Category: 
Keyword: 
multi-carrier modulationPartial Frequency ARQ systemStatic Carrier AssignmentDynamic Carrier Assignment
 Summary | Full Text:PDF